Decorated or covered with studs, or having many small projections; also means set or filled thickly with something.
From stud (a small projection, nail, or fastener). Originally a construction term, then extended metaphorically to mean 'dotted with' or 'scattered across.'
A studded leather jacket and a 'star-studded' cast use the same metaphor—both scatter things thickly across a surface like studs punched into material.
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